# File lib/spring/client/binstub.rb, line 178
      def call
        case @mode
        when :add
          bindir.mkdir unless bindir.exist?

          File.write(spring_binstub, SPRING)
          spring_binstub.chmod 0755

          items.each(&:add)
        when :remove
          spring_binstub.delete if @all
          items.each(&:remove)
        else
          raise ArgumentError
        end
      end